Friction brake



- W. H. LEWIS" FRICTION BRAKE ,Filed Nov. 18. 1924 gmemtoz rteiz'vard' the of' the casin andhold' the I I eral surface of the -r1ng' and at the ends of the outeredgesof the eccentric portion 3,

Patented Decal, 1925. V

- 7 winner: It. nwis, or ianrrnoiv, OREGON.

' FRICTION-BRAKE,

Application-tiled November 18, 1924. {Serial m5. 750,566.

To all wh m'it may concern, Y 1- Be it known that 1, WI LIAM LEWIS, "a citizen of the United States, residing at Bandon, in the county of Coos and Stateof Oregon, have inventedcertainnewand j useful Improvements in Friction Brakes, of

which the following is a specification..

This invention relates .to friction brake" structures especially adapted to be used" upon automobile machines, and it consists in the novel features hereinafter described and claimed; r An object of the invention is to provide a brake mechanism of simple and, durable '15 structure, and including a casing adapted to Y be applied to the wheel of the machinathere being housed. within the casing, a pair of' brake shoes, which are normally he'ld,- by means of springs out of .engagementvwith the inner surface of-the casing. .The shoes are mounted upon carriers, and a-ri-ng providedwith eccentric surfaces is mounted for turnlng movement upon the axle housmg,

-. land when turned, the eccentric portions thereof, force the shoe carriers and the shoes shees'in frictional contact t 'erewith.

[In the'gac'com panying. drawing: I

the friction'brake mechanismr p v AsindicatedM-in'the accompanying drawhousing '1, and is provided at diametrically Y opposite sidesfw'ith outwardly disposedem,

' centric portions 3. A lever -4=I,is mounted upon'the ring, and-has an endportion which is disposed beyondthe outer peripheral surface of the ring. 1 A spring 5'is connected with the lever 4, at one end, and at its other end is connected, with the housing, hereinafter to be described, and in w ich the partsof the brake are enclosed. A rod 6 is connected atone end with the lever '4,

and it may be used for swinging the lever 4 and turning the 2 upon the axle 5 housing'l. A casing isconcentrically mounted with relation to the housing 1,and ma be attached to the wheelof the automo ile machine (not shown), in' a usual n anner. The housing 1 is provided at its Figuref'lv isi'a side elevation of the friction-- Figure 21is,,,a'-transverse sectional view of "ing, the axle 'li'ousing,qto"which.-the mechanism is applied, is'ind'icated' at 1. ring 2 is mounted forjturning movement upon the 1 them the sleeve 9,-carrier plates 12, and the opposite sides with 'radially disposed shafts 8. Sleeves 9 are mounted-for sliding movement of the shafts 8, and are providecl at their "sides. with angularly disposed studs 10, upon-which are journaled friction rollers 11. The rollers- 11 'are adapted toengage theouter peripheral surface ,of the ring 2, and the-outer edges of the eccentric portions 3there0f.

' Plates 12 are carried by the sleeves 9, and

vthe said plates,in turn, carry at their outer "edges arcuate shoes 13; The shoes 13 extend partially around the inner surface of y the casing, 7, and the end portionsof the shoes 13, at the op 'osite sides of the housmg 1, are connects together with traction spr1ngs 14=. The springs 14 are'under tension, with a'tendency to normally hold the shoes 13, out of engagement with the peripheral surface of the casing 7', and the rollers 11, in engagement with the peripheral surface of the ring. 2, or theouter edges of the portion 3 thereof. The spring 5 is unde'r tension, with a tendency to normally hold the ring 2 in such a position that the rollers 11 normally bear against the periphand the outer edges of the eccentric portion 3 of the ring 2 are forced between the rollers 11, wherebythe said rollers are spread, wlth relation to each other, carrying with shoes 13. Thus the shoes 13-are spread, with relation to each other, and the springs 14 are elongated, and the outer surfaces ofthe shoes 13 come in contact with the inner sur .face ofthecasing 7. ,In that the said casing is applied to the wheel of the automobile machine, the brake is applied to the wheel. I When the rod 6 is released, the spring 5' contacts, andreturns the ring 2 to 'itsnormal position, upon the axle Housing 1, and the springs'l tcontract and draw the shoes 13 away from the periphery of the casing 7.

The shoes 13 are detachably connected with they carrier plates 12, by means of bolts 12'. Therefore "when the shoes become worn, they may be readily removed from the carrier plate for repair, or other shoes in proper condition may be substituted for those that are removed. I Having thus described the invention, what is claimed is:

1. A friction brake comprising a support, a casing mounted concentrically thereon, a ringmounted for turning movement upon the support, and provided with eccentrically disposed portions, means for turning the ring, means for returning the ring to normal position, shafts carried by the support,

. sleeves slidably mounted upon the shaft and having studs, rollers journaled upon the studs and bearing against the ring, supporting plates carried by' the sleeves, shoes carried by the supporting plates, and traction springs connecting the shoes together.-

' 2. A friction brake comprising a support,

a casing mounted concentrically thereon, radially disposed shafts carried by the support and housed within the casing, a ring mounted for turning movement upon the support and having outwardly disposed eccentric portions,v a lever attached to the ring, a spring connected with the lever and the casing, means for swinging the lever, sleeves slidably mounted upon the shaft, said sleeves having outstanding studs, rollers journaled upon the studs and bearing against the periphery of the ring,. carrier plates carried by the sleeves,- brake shoes carried by the carrienplates, and springs disposed transversely of the support, and connected at their opposite ends with the brake shoes.

. In testimony whereof I afiix my signature.

WILLIAM H, LEWIS. 

